0000000000592062
AUTHOR
Jarmo Hämäläinen
Supplemental Material, Supplementary_File_1 - Brain event-related potentials to phoneme contrasts and their correlation to reading skills in school-age children
Supplemental Material, Supplementary_File_1 for Brain event-related potentials to phoneme contrasts and their correlation to reading skills in school-age children by Urs Maurer, Catherine McBride, Jarmo Hämäläinen, Nicole Landi, Otto Loberg, Kaisa Lohvansuu, Kenneth Pugh, and Paavo H. T. Leppänen in International Journal of Behavioral Development
Attentional Processes in Children With Attentional Problems or Reading Difficulties as Revealed Using Brain Event-Related Potentials and Their Source Localization.
Visual attention-related processes include three functional sub-processes: alerting, orienting, and inhibition. We examined these sub-processes using reaction times, event-related potentials (ERPs), and their neuronal source activations during the Attention Network Test (ANT) in control children, attentional problems (AP) children, and reading difficulties (RD) children. During the ANT, electroencephalography was measured using 128 electrodes on three groups of Finnish sixth-graders aged 12–13 years (control = 77; AP = 15; RD = 23). Participants were asked to detect the direction of a middle target fish within a group of five fish. The target stimulus was either preceded by a cue (center, d…
Supplemental Material, Supplementary_File_2 - Brain event-related potentials to phoneme contrasts and their correlation to reading skills in school-age children
Supplemental Material, Supplementary_File_2 for Brain event-related potentials to phoneme contrasts and their correlation to reading skills in school-age children by Urs Maurer, Catherine McBride, Jarmo Hämäläinen, Nicole Landi, Otto Loberg, Kaisa Lohvansuu, Kenneth Pugh, and Paavo H. T. Leppänen in International Journal of Behavioral Development
Auditory-evoked potentials to changes in sound duration in urethane-anesthetized mice
Spectrotemporally complex sounds carry important information for acoustic communication. Among the important features of these sounds is the temporal duration. An event‐related potential called mismatch negativity indexes auditory change detection in humans. An analogous response (mismatch response) has been found to duration changes in speech sounds in rats but not yet in mice. We addressed whether mice show this response, and, if elicited, whether this response is functionally analogous to mismatch negativity or whether adaptation‐based models suffice to explain them. Auditory‐evoked potentials were epidurally recorded above the mice auditory cortex. The differential response to the chang…
Reproducibility of Brain Responses: High for Speech Perception, Low for Reading Difficulties
Neuroscience findings have recently received critique on the lack of replications. To examine the reproducibility of brain indices of speech sound discrimination and their role in dyslexia, a specific reading difficulty, brain event-related potentials using EEG were measured using the same cross-linguistic passive oddball paradigm in about 200 dyslexics and 200 typically reading 8–12-year-old children from four countries with different native languages. Brain responses indexing speech and non-speech sound discrimination were extremely reproducible, supporting the validity and reliability of cognitive neuroscience methods. Significant differences between typical and dyslexic readers were fou…
Change detection to tone pairs during the first year of life : Predictive longitudinal relationships for EEG-based source and time-frequency measures
Brain responses related to auditory processing show large changes throughout infancy and childhood with some evidence that the two hemispheres might mature at different rates. Differing rates of hemispheric maturation could be linked to the proposed functional specialization of the hemispheres in which the left auditory cortex engages in analysis of precise timing information whereas the right auditory cortex focuses on analysis of sound frequency. Here the auditory change detection process for rapidly presented tone-pairs was examined in a longitudinal sample of infants at the age of 6 and 12 months using EEG. The ERP response related to change detection of a frequency contrast, its estima…
Dyslexia : early Identification and Prevention: Highlights from the Jyväskylä Longitudinal Study of Dyslexia
Over two decades of Finnish research, monitoring children born with risk for dyslexia has been carried out in the Jyväskylä Longitudinal Study of Dyslexia (JLD). Two hundred children, half at risk, have been assessed from birth to puberty on hundreds of measures. The aims were to identify measures of prediction of later reading difficulty and to instigate appropriate and earliest diagnosis and intervention. We can identify at-risk children from newborn electroencephalographic brain recordings (Guttorm et al., J Neural Transm 110:1059–1074, 2003). Predictors are also apparent from late-talking infants who have familial background of dyslexia (Lyytinen and Lyytinen, Appl Psycolinguistics 25:3…
Music training enhances rapid neural plasticity of N1 and P2 source activation for unattended sounds
Neurocognitive studies have demonstrated that long-term music training enhances the processing of unattended sounds. It is not clear, however, whether music training also modulates rapid (within tens of minutes) neural plasticity for sound encoding. To study this phenomenon, we examined whether adult musicians display enhanced rapid neural plasticity compared to non-musicians. More specifically, we compared the modulation of P1, N1, and P2 responses to standard sounds between four unattended passive blocks. Among the standard sounds, infrequently presented deviant sounds were presented (the so-called oddball paradigm). In the middle of the experiment (after two blocks), an active task was p…